Unnamed Tributary to Pine Creek N of Volga (Volga_Nagle_51)
Fish Session #933
- Sample Date
- 8/1/2024
- Timeframe
- 1579 seconds of backpack EF effort
- Reach Size
- 270 ft
- Method
- Standard Wadeable
- Sample Quality
- Good
- Last Update
- 10/11/2024 10:38:51 AM
This site is on privately-owned land. The DNR obtains permission from the landowner(s) prior to conducting any sampling surveys.
Warm Water
Excellent
water temperature of 62 degrees conductivity was 668 µs/cm backpack EF unit set on 90/25 130V 2A
- Identity verification status for this species
- Morphometrics: Length/Weight measurements of individual specimens
- Taxa excluded from species count metrics.
- Click on species name for more information about that species
| Species | Catch | |
|---|---|---|
|
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae Tolerance: Tolerant Trophic: Generalist Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
55 | |
|
Western Blacknose Dace
Latin: Rhinichthys obtusus
Family: Leuciscidae Tolerance: Intermediate Trophic: Insectivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
44 | |
|
Johnny Darter
Latin: Etheostoma nigrum
Family: Percidae Tolerance: Intermediate Trophic: Benthic Invertivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
35 | |
|
Southern Redbelly Dace
Latin: Chrosomus erythrogaster
Family: Leuciscidae Tolerance: Sensitive Trophic: Herbivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
27 | |
|
Stoneroller spp.
Latin: Campostoma spp.
Family: Leuciscidae Tolerance: N/A Trophic: Herbivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
16 | |
|
Fantail Darter
Latin: Etheostoma flabellare
Family: Percidae Tolerance: Intermediate Trophic: Benthic Invertivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
10 | |
|
Brook Stickleback
Latin: Culaea inconstans
Family: Gasterosteidae Tolerance: Sensitive Trophic: Insectivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
3 | |
|
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae Tolerance: Intermediate Trophic: Omnivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
1 | |
FIBI Calculation Factors
| Factor | Value |
|---|---|
| Drainage area (mi2) | 1.4900 |
| Log(DA) | 0.1732 |
| Total Fish | 191 |
| Fish per 500 ft | 354 |
| Total Species | 8 |
| # Excluded Species | 0 |
| # Exotic Species | 0 |
| # LMB-BG | 0 |
| Calculation Last Updated | 10/28/2025 7:04:37 AM |
Fish Index of Biotic Integrity
| Metric Name | Value | Score |
|---|---|---|
| Native Species | 8 | 10 |
| Sucker Species | 1 | 10 |
| Sensitive Species | 2 | 10 |
| Benthic Invertivore Species | 2 | 10 |
| Top 3 Abundance Percentage | 70.16 | 10 |
| Benthic Invertivore Percentage | 23.56 | 10 |
| Omnivore Percentage | 0.52 | 10 |
| Top Carnivore Percentage | 0 | 0 |
| Lithophilous Spawner Percentage | 0 | 0 |
| Tolerance Index | 5.71 | 6.81 |
| Adjusted Catch per Unit Effort | 44.44 | 4.44 |
| DELT Percentage Adjustment | 0 | 0 |
FIBI Score Explained
Sites that score between 71 - 100 are considered excellent. Fish (excluding tolerant species) are fairly abundant or abundant. A high number of native species are present, including many long-lived, habitat specialist, and sensitive species. Sensitive fish species and species of intermediate pollution tolerance are numerically dominant. The three most abundant fish species typically comprise 50% or less of the total number of fish. Top carnivores are usually present in appropriate numbers and multiple life stages. Habitat specialists, such as benthic invertivore and simple lithophilous spawning fish are present at near optimal levels. Fish condition is good; typically less than 1% of total fish exhibit external anomalies associated with disease or stress.
This location has been classified as a survey site. Survey sites are compared to reference sites within the same ecoregion. A reference site represents natural stream qualities that are least disturbed by human activities within the watershed. Reference sites are grouped by ecoregion to establish a benchmark against which these survey streams are compared.
EcoRegion Comparison
Scores for a sampling session are compared against reference sites within the same ecoregion:
Paleozoic Plateau (Driftless Area)
This site is in the Paleozoic Plateau (Driftless Area) ecoregion.
| Max | 91 |
| 75th Percentile | 63 |
| Median | 53 |
| 25th Percentile | 47 |
| Min | 9 |
| This Session's Score | 74 |
| Total Reference Site Samples | 118 |
| Mean | 55.41 |
| Standard Deviation | 15.95 |